E Class, Iberia Submarine (Coastal) laid down 1936
Displacement:
494 t light; 506 t standard; 552 t normal; 588 t full load
Dimensions: Length overall / water x beam x draught
145.30 ft / 144.36 ft x 16.40 ft (Bulges 19.69 ft) x 13.12 ft (normal load)
44.29 m / 44.00 m x 5.00 m (Bulges 6.00 m) x 4.00 m
Armament:
1 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1936 Model
Dual purpose gun in deck mount
on centreline amidships, 1 raised gun
2 - 0.98" / 25.0 mm guns (1x2 guns), 0.48lbs / 0.22kg shells, 1936 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
Weight of broadside 31 lbs / 14 kg
Shells per gun, main battery: 100
5 - 21.0" / 533.4 mm submerged torpedo tubes
Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 1,643 shp / 1,225 Kw = 16.00 kts
Range 5,000nm at 10.00 kts
Bunker at max displacement = 82 tons
Complement:
56 - 74
Cost:
£0.143 million / $0.570 million
Distribution of weights at normal displacement:
Armament: 4 tons, 0.7 %
Machinery: 46 tons, 8.3 %
Hull, fittings & equipment: 344 tons, 62.2 %
Fuel, ammunition & stores: 58 tons, 10.6 %
Miscellaneous weights: 100 tons, 18.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
74 lbs / 34 Kg = 2.4 x 3.9 " / 100 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.03
Metacentric height 0.4 ft / 0.1 m
Roll period: 13.9 seconds
Steadiness - As gun platform (Average = 50 %): 7 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 0.02
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.518
Length to Beam Ratio: 7.33 : 1
'Natural speed' for length: 12.01 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 1.64 ft / 0.50 m
- Forecastle (20 %): 1.64 ft / 0.50 m
- Mid (50 %): 1.64 ft / 0.50 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 1.11 ft / 0.34 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 204.0 %
- Above water (accommodation/working, high = better): 6.5 %
Waterplane Area: 1,604 Square feet or 149 Square metres
Displacement factor (Displacement / loading): 247 %
Structure weight / hull surface area: 116 lbs/sq ft or 568 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.89
- Longitudinal: 5.06
- Overall: 4.00
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability
Diving depth = 400'
Emergency dive = 640'
Crush depth = 1000'